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Northwest Africa 10142
Basic information Name: Northwest Africa 10142
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10142
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 102 g
Meteoritical Bulletin:  MB 104  (2015)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 288 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 31 May 2015
Writeup from MB 104:

Northwest Africa 10142 (NWA 10142)

(Northwest Africa)

Purchased: 2014

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in Mauritania by Mohamed Aid, 2014.

Physical characteristics: Single stone. A saw cut reveals a feldspathic breccia with dark-gray shock melt veins.

Petrography: (C. Agee, UNM) This meteorite is dominated by feldspathic-rich domains of fine-grained crystals and larger plagioclase fragments. Abundant shock melt veins are present, some with vesicles. Accessory troilite and ilmenite were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) olivine Fa21.3±3.6, Fe/Mn=105±5, n=2; pigeonite Fs25.5±7.9Wo12.0±1.6, Fe/Mn=57±6, n=2; augite Fs17.6±4.7Wo43.2±1.5, Fe/Mn=49±15, low Ca pyroxene Fs51.3Wo2.2, Fe/Mn=63, n=1; plagioclase An96.5±0.4Ab3.3±0.4Or0.2±0.0, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.6±0.5, TiO2=0.18±0.07, Al2O3=31.8±2.2, Cr2O3=0.06±0.04, MgO=3.3±1.7, FeO=3.0±1.3, MnO=0.04±0.02, CaO=17.3±0.5, NiO=0.01±0.01, Na2O=0.33±0.03, K2O=0.06±0.02 (all wt%), Fe/Mn=88±62, Mg#=64±7, MgO+FeO=6.3±2.9 (wt%), n=23.

Classification: Lunar (feldspathic breccia)

Specimens: 20.5 g including a probe mount on deposit at UNM, Jarkko Kettunen holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2014
Mass (g):102
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):21.3±3.6
Ferrosilite (mol%):51.3, 25.5±7.9, 17.6±4.7
Wollastonite (mol%):2.2, 12.0±1.6, 43.2±1.5
Classifier:C. Agee, UNM
Type spec mass (g):20.5
Type spec location:UNM
Main mass:Jarkko Kettunen
Comments:Field name AID4; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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